Symfony 2.8 breaks HtmlPageDom
Changed required Symfony version to be less than 2.8 because of breaking changes in the Crawler component. Removed "semi-official support" for HHVM because Travis tests on HHVM fail again.
Changed required Symfony version to be less than 2.8 because of breaking changes in the Crawler component. Removed "semi-official support" for HHVM because Travis tests on HHVM fail again.